Contrast visual acuity, contrast threshold increases, Book cover wholesale the visual contrast sensitivity decreases. Tip retina and optic nerve Book cover wholesale decreased ability to distinguish form sense, Book cover wholesale is an important manifestation of central fatigue, eye fatigue is so multifaceted eye function decline.

Book cover wholesale brightness white and yellow are similar, but white light contains a variety of colored light entering the eye more than the quantum of light reaching the retina, large energy consumption. Yellow contrary, Book cover wholesale its spectral single quantum of light entering the eye and less energy consumption reduction can reduce visual central fatigue. The human eye in the yellow part of the spectrum of the light sense, visual efficiency, therefore, Book cover wholesale at the same time, the use of yellow and white Book cover wholesale, the yellow Book cover wholesale high delay, in contrast visual acuity, contrast threshold increases delay and adjustment fatigue.

2.2 red dot yellow paper

Found that different colors of paper to different wavelengths of light reflecting different characteristics, Book cover wholesale and confirmed that the amount of stimulation provided by the relevant regulation. Thus, Wang Zhiyong [5], Book cover wholesale who used white, yellow, red Huang, among comparative differences in the incidence of eye fatigue and eye strain rate relationship with the reflection coefficient.